Did you ever watch "Who Am I?" and wonder if a coconut IV was actually possible? Well like many of the small details in a Jackie Chan movie this is actually not only possible but an accepted medical treatment in many parts of the world.
In actual fact it is not coconut milk that is used - coconut's don't actually have milk inside them but water. Coconut milk is made from the flesh/meat of a coconut. You obtain it by grating the flesh/meat of a ripe coconut, adding boiling water and squeezing the 'milk' out from it. You can make your own coconut milk at home if you have access to fresh coconuts.
Coconut water (the liquid you find inside coconuts) is regarded as a refreshing drink in many parts of the world. It is also sterile and contains sufficient trace elements to be used an alternative to saline solution in medical situations. Because it lacks sodium and chloride (sodium chloride = salt) table salt may be added to the liquid to prevent the patient needing additional supplementation later.
To read more about COCONUT WATER and some medical information about coconut water HERE